客户端：mhxy162
服务端：mhxy163

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2. 把客户端的秘钥发布到服务端mhxy163.cn，参数-i 指定客户端秘钥文件

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[root@mhxy162 ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.137.163
root@192.168.137.163's password:
Now try logging into the machine, with "ssh 'root@192.168.137.163'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@mhxy162 ~]# ssh 192.168.137.163 --可以通过秘钥登录
Last login: Sat May 21 23:02:39 2016 from mhxy162
[root@mhxy163 ~]#

3. 在服务端查看.ssh服务文件，从客户端发布来的文件被重命名为authorized_keys

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[root@mhxy163 .ssh]# ll
total 8
-rw------- 1 root root 397 May 21 23:03 authorized_keys --秘钥登录文件
-rw-r--r-- 1 root root 177 May 21 23:05 known_hosts --SSH登录记录的文件
[root@mhxy163 .ssh]#
[root@mhxy163 .ssh]# cat authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyHM8Q09kQ0xg+ZhrkLto1gdUV07sLQGsnoHFzkwGtKBftdbSOmEacGoz8Tn/ZL5IuJlFZt+DFwCK0ZIf/ecwP/QpBhWbQ5cOcjWjjqCSauCtoPrgPzdp7OMnSuCbGDk0QCfW19PW7ct8OPaOs5868kexIhc5f1jpY7TriJ4I3z0s4on6v69PTkVEd/qo+eZ73dHrTojV40No+d6VDWIbIRM7eU/DRnJqSZ9R2JZg+RNWf3ljoX204aHw7HZ2aBibKgxXsImQTMVZqpyRQ+OinTXO8acfDRRw3gOCoiN4V+m0h9CthUkfjiE1ai5M5/y/Mk9SkpEqSIKKRVl3NV5rDQ== root@mhxy162.cn
[root@mhxy163 .ssh]# cat known_hosts
192.168.137.163 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBOyOeMy5W+53bBgrK+yoiL6zOBj3WxBFEiNipdeiVGUMJ5BIpaLOob7Vs1T7eudLz+R9d3an+EtaLBKSPRrw8aU=
[root@mhxy163 .ssh]#

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